A relay center has a first telephone line (12) and a second telephone line (14). data signals may be carried on the first telephone line (12) and received into a modem (20). A terminal or computer (22) then receives the data signals and converts the signals into readable characters viewable on a display (26). An operator then reads messages formed by the characters and voices them into a telephone (28) connected to the second telephone (14). The operator may also receive spoken words through the telephone (28) and transcribe via a keyboard (24) for transmission of data signals by the modem (20) and carried on the first telephone line (12). Upon a command received through the first telephone line (12) or made by the operator, a voice bridge (10) may be established which establishes a direct vocal link from either the first telephone line (10) to the second telephone line (12) or from the second telephone line (12) to the first telephone line (14 ). A second command disconnects the telephone (28) from the second telephone line (14) to prevent the operator from hearing the audio sounds carried by the voice bridge (10).
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14. A method of forming a voice bridge in a relay center, the method comprising the steps of:
(a) receiving data signals over a first telephone line; (b) converting the data signals into readable characters and projecting the characters upon a display; (c) reading and voicing any messages formed by the characters into a telephone that connects with a second telephone line; (d) detecting data signals received over the first telephone line to discriminate between voice signals and data signals on the first telephone line; and (e) switching the first telephone line from a mode that receives data signals and does not pass the data signals to the second telephone line to a mode where voice signals on the first telephone line are connected to the second telephone line when voice signals are being received on the first telephone line.
15. A method of forming a voice bridge in a relay center, the method comprising the steps of:
(a) receiving data signals over a first telephone line; (b) converting the data signals into readable characters and projecting the characters upon a display; (c) reading and voicing any messages formed by the characters into a telephone that connects with a second telephone line; (d) detecting data signals received over the first telephone line to discriminate between voice signals and data signals on the first telephone line; and (e) switching the first telephone line from a mode that receives data signals and does not pass the data signals to the second telephone line to a mode where voice signals on the first telephone line are connected with the second telephone line when the data signals are terminated as detected in the detecting step.
16. A method of forming a voice bridge in a relay center, the method comprising the steps of:
(a) receiving data signals over a first telephone line; (b) converting the data signals into readable characters and projecting the characters upon a display; (c) reading and voicing any messages formed by the characters into a telephone that connects with a second telephone line; (d) detecting data signals received over the first telephone line to discriminate between voice signals and data signals on the first telephone line; (e) switching the first telephone line from a mode that receives data signals and does not pass the data signals to the second telephone line to a mode where voice signals on the first telephone line are connected to the second telephone line depending on whether voice signals or data signals are being received on the first telephone line; (f) detecting the level of voice signals on the first telephone line; and (g) disconnecting the telephone from the second telephone line when the voice signals of the first telephone line are of a sufficient pre-selected level.
17. A method of forming a voice bridge in a relay center, the method comprising the steps of:
(a) receiving data signals over a first telephone line; (b) converting the data signals into readable characters and projecting the characters upon a display; (c) reading and voicing any messages formed by the characters into a telephone that connects with a second telephone line; (d) detecting data signals received over the first telephone line to discriminate between voice signals and data signals on the first telephone line; (e) switching the first telephone line from a mode that receives data signals and does not pass the data signals to the second telephone line to a mode where voice signals on the first telephone line are connected to the second telephone line depending on whether voice signals or data signals are being received on the first telephone line; (f) detecting the level of voice signals on the second telephone line; and (g) disconnecting the telephone from the second telephone line when the voice signals of the second telephone line are of a sufficient pre-selected level.
11. A voice bridge for a relay center, the voice bridge comprising:
(a) a first telephone line; (b) a modem capable of receiving and transmitting data signals over the first telephone line; (c) a terminal having a keyboard and a display, the terminal converting the data signals received by the modem into readable characters and projecting the characters upon the display, and the terminal transmitting data signals that are entered upon the keyboard through the modem; (d) a telephone that connects with a second telephone line, the telephone being positioned in such proximity to the keyboard and the display that an operator may read the characters exhibited on the display and voice any message formed by the characters into the telephone and the operator may transcribe any vocal message received on the telephone into the keyboard; (e) a detector connected to the first telephone line detecting data signals on the first telephone line and discriminating voice signals from data signals on the first telephone line; and (f) a switch connected and operated by the detector to switch the first telephone from a first mode not connected with the second telephone line to a second mode connected with the second telephone line so that in the second mode voice signals from the second telephone line are passed to the first telephone line.
1. A voice bridge for a relay center, the voice bridge comprising:
(a) a first telephone line; (b) a modem capable of receiving and transmitting data signals over the first telephone line; (c) a terminal having a keyboard and a display, the terminal converting the data signals received by the modem into readable characters and projecting the characters upon the display, and the terminal transmitting data signals that are entered upon the keyboard through the modem; (d) a telephone that connects with a second telephone line, the telephone being positioned in such proximity to the keyboard and the display that an operator may read the characters exhibited on the display and voice any message formed by the characters into the telephone and the operator may transcribe any vocal message received on the telephone into the keyboard; (e) means for detecting data signals on the first telephone line to discriminate voice signals from data signals on the first telephone line; and (f) means responsive to the detecting means for switching the first telephone line from a first mode not connected with the second telephone line to a second mode connected with the second telephone line when the detecting means detects voice signals on the first telephone line, so that in the second mode, voice signals are passed directly between the first and second telephone lines.
6. A voice bridge for a relay center, the voice bridge comprising:
(a) a first telephone line; (b) a modem capable of receiving and transmitting data signals over the first telephone line; (c) a terminal having a keyboard and a display, the terminal converting the data signals received by the modem into readable characters and projecting the characters upon the display, and the terminal transmitting data signals that are entered upon the keyboard through the modem; (d) a telephone that connects with a second telephone line, the telephone being positioned in such proximity to the keyboard and the display that an operator may read the characters exhibited on the display and voice any message formed by the characters into the telephone and the operator may transcribe any vocal message received on the telephone into the keyboard; (e) means for detecting data signals on the first telephone line to discriminate voice signals from data signals on the first telephone line; (f) first means responsive to the detecting means for switching the first telephone line from a first mode not connected to the second telephone line to a second mode connection with the second telephone line so that in the second mode voice signals are passed through the first and second telephone lines; and (g) second means for switching, the second means for switching disconnecting the telephone from the second telephone line when the voice signals of a sufficient pre-selected level are transferred between the first and second telephone lines.
13. A voice bridge for a relay center, the voice bridge comprising:
(a) a first telephone line; (b) a modem capable of receiving and transmitting data signals over the first telephone line; (c) a terminal having a keyboard and a display, the terminal converting the data signals received by the modem into readable characters and projecting the characters upon the display, and the terminal transmitting data signals that are entered upon the keyboard through the modem; (d) a telephone that connects with a second telephone line, the telephone being positioned in such proximity to the keyboard and the display that an operator may read the characters exhibited on the display and voice any message formed by the characters into the telephone and the operator may transcribe any vocal message received on the telephone into the keyboard; (e) a detector connected to the first telephone line detecting data signals on the first telephone line and discriminating voice signals from data signals on the first telephone line; (f) a switch connected and operated by the detector to switch the first telephone line from a first mode not connected with the second telephone line to a second mode connected with the second telephone line so that in the second mode voice signals from the second telephone line are passed to the first telephone line; and (g) a second switch connected to disconnect the telephone from the second line when voice signals of a sufficient level are transferred from the first telephone line to the second telephone line.
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This application is a continuation of application Ser. No. 07/255,357, filed Oct. 11, 1988, now abandoned.
The present invention relates generally to relay centers that allow telephone communication between a hearing-impaired party using telecommunications devices for the deaf (TDD) and a non-TDD equipped hearing party, and particularly pertains to a voice bridge that allows voice to pass in one direction through the relay.
The deaf or hearing-impaired that cannot hear well enough to use the telephone use communication terminals to converse over telephone lines. Such terminals are referred to as telecommunication devices for the deaf, or TDDs, and are comprised of a keyboard and display. TDDs are connected to a telephone line through a modem which allows the terminal to transmit information over a telephone line to another electronic device which is connected to the telephone line through another modem. When characters are typed by a first party on the keyboard of a first terminal, tones corresponding to the characters are transmitted via the modem through the telephone line to a second terminal. At the second terminal, the tones are received by a second modem and converted back to characters to be read by a second party. In this manner, a conversation proceeds by the taking of turns by each of the users in the typing back and forth on the TDDs. In order to have a TDD conversation, however, both parties must have a TDD.
It is often necessary or desirable for a TDD user to call a telephone number that is not equipped with a TDD. These calls may be either emergency or non-emergency, e.g. telephone calls to police, employers, doctors, repair and maintenance workers, relatives and loved ones, etc. In order to make possible telephone calls between a TDD user and a non-TDD equipped telephone number, TDD relay centers have been established in many locations. A TDD relay center receives telephone calls from TDD users who request, via TDD, for a relay operator to place a call with a second party for them. The relay operator then calls the second party and tells the second party what the TDD caller is typing. When the second party talks, the operator then types back to the TDD caller. Conversely, a call through the relay center may originate from a non-TDD user wishing to communicate with a TDD user. The call then proceeds in the same manner.
Calls placed through a relay center can be frustrating in that they are slow and lack privacy. Those people that can speak, but not hear, may prefer to talk directly to the other party and have the operator type back the response. Similarly, a speech impaired caller would rather listen for themselves rather than have the operator interpret.
In accordance with the present invention, a voice bridge is incorporated into a TDD relay center that allows a voice to pass through a relay such that a hearing-impaired caller may speak directly to the other party. In the same way, a speech-impaired caller may listen to the other party and use a TDD to respond. By allowing voice to pass in one direction through the relay, the telephone calls are shorter and more like a conventional telephone call. The privacy of the caller increases in that the operator may be optionally prevented from hearing the voice portion of the conversation. In addition, the relay operator and the second party are prevented from hearing the TDD tones on the line, which may be loud and would otherwise prevent the operator from talking to the second party.
Where the option to prevent the operator from hearing the voice portion of the conversation is exercised, the task of the operator may be facilitated in that the operator does not have to distinguish between the voices of the two parties before typing. Such an arrangement is less burdensome and less confusing to the operator because only one half of the conversation needs to be monitored and interpreted.
It is an object of the present invention to allow voice and data to interchange automatically through the relay center.
It is a further object of the invention to shorten relay center calls.
It is yet another object of the invention to increase the privacy of the caller.
Further objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
In the drawings:
FIG. 1 is a schematic drawing of the voice bridge of the present invention, the switching arrangement representing the mode in which the voice bridge is disabled.
With reference to the drawings, a voice bridge for a relay center is shown at 10 in FIG. 1. A first telephone line 12 originates from a TDD (telecommunications devices for the deaf) user and a second telephone line 14 is connected to a non-TDD user. A TDD is comprised of a keyboard, a display, and a modem. During a typical relay call through the relay center without a voice bridge, a line 16 leading from the telephone line 12 is connected through a telephone link 18 to a modem 20. The modem 20 is then connected to a terminal or computer 22 having an associated keyboard 24 and display 26. Shown upon the display 26 is the message of the TDD user, which has been typed in at a keyboard of the TDD (not shown) of the TDD user, transmitted through the telephone line 12 by a modem of the TDD user (not shown), received by the modem 20, and translated back into a visual character set by the terminal or computer 22. A relay operator then reads the message to the non-TDD user over a telephone 28 which is connected to a line 30, the line 30 leading to the telephone line 14. When the non-TDD user responds, the message is transcribed by the relay operator to a character set by the keyboard 24, transmitted back through the telephone line 12 by the modem 20, received by the modem of the TDD user, and translated back into a character set by the computer or TDD of the TDD user. The telephone 28 is positioned proximate to the keyboard 24 and the display 26 so that the operator may operate the keyboard 24 and read the display 26 while manning the telephone 28. A TDD used by the operator is substitutable for the modem 20, the keyboard 24, and display 26, as a TDD comprises those elements.
To allow voice to pass from the telephone line 12 to the telephone line 14, or vice versa, the voice bridge 10 is used. In order to control the state of the voice bridge 10, circuitry to form a TDD detect and bridge control 32 is used. A line 34 from the telephone line 12 leads to the TDD detect and bridge control 32. The logic of the TDD detect and bridge control acts on a line 36 to open and close switches 38 and 40 in unison to disable or enable the voice bridge 10. When TDD signals are detected on the line 34 originating from the line 12 or the line 16 by the TDD detect and bridge control 32, the switches 3S and 40 are opened, thereby disabling the voice bridge 10. When TDD signals are not detected on the line 34, the switches 38 and 40 are closed to allow voice or other audio to pass from the line 12 to the line 14, or from the line 14 to the line 12, whichever the case may be. Where the TDD user is hearing impaired but capable of speech, the direction of voice or other audio is from the line 12 to the line 14. Where the TDD user is speech impaired but capable of hearing, the direction of voice or other audio is from the line 14 to the line 12. A bridge polarity reversal switch 42 controls the direction of voice or other audio through a line 43 and is discussed further below.
A level detect circuit 44 may, upon command of either the TDD user or operator be used as a privacy option to prevent audio sounds on either of the lines 12 or 14 from being carried to the telephone 28. For the case of the hearing impaired TDD user capable of speech, the direction of the audio on the voice bridge 10 is from the telephone line 12 to the telephone line 14 when the voice bridge 10 is enabled. The level detect circuit 44 detects the audio as carried on a line 46 leading from the bridge polarity reversal switch 42. Where the audio level is sufficient and the bridge 10 is enabled (the bridge 10 is enabled when there are no TDD signals on the telephone line 12), a switch 48 on the line 30 is opened to prevent audio on the line 12 from being carried to the telephone 28, thus providing privacy to the TDD user. An AND gate 50, or equivalent, controls the opening and closing of the switch 48. The switch 48 is normally closed, but the switch 4S is opened when the privacy option is invoked and signals representing both a sufficient audio sound from the level detect circuit 44 and an enabled voice bridge 10 is received by the AND gate 50.
Where the direction of the audio on the voice bridge 10 is from the telephone line 14 to the telephone line 12 (i.e., a speech impaired user who is capable of hearing), the level detect circuit 44 may be used, upon command, to detect audio sounds on the line 14. Where the privacy option is invoked, the audio level is sufficient, and the bridge 10 is enabled (the bridge 10 is enabled when there are no TDD signals on the telephone line 12) the switch 48 is opened so that privacy is provided to the non-TDD user.
The voice bridge 10 comprises two coupling transformers 52 and 54 connected in series, an amplifier gain control stage 56, the TDD detect and bridge control 32, the level detect circuit 44, and the bridge polarity reversal switch 42. In operation, there are five possible modes, each of the modes representing different switching arrangements and direction of audio sounds through the voice bridge 10.
In the first mode as depicted in FIG. 1, the voice bridge 10 is disabled to allow TDD data from the TDD user to be received by the modem 20 where it is fed to the terminal or computer 22 and converted to a character set. As shown in FIG. 1, the switches 38 and 40 are opened and the voice bridge 10 is disabled. The relay operator reads the message from the TDD user displayed upon the keyboard 24 over the telephone 28; the switch 48 is closed to allow the voice of the relay operator to be carried on the line 14. The voice of the non-TDD user is also carried back to the operator on the lines 14 and 30 so that the operator may transcribe the vocal message from the non-TDD user into a character set via the keyboard 24 and transmitted across the telephone line 12 by the modem 20.
A second mode of operation occurs when a hearing-impaired TDD user is capable of speech and privacy is not invoked when audio sounds are carried through the voice bridge 10 from the telephone line 12 to the telephone line 14. The bridge 10 from the line 12 to the line 14 may be requested by a string or sequence of characters typed in on the TDD user terminal (not shown) or on the operator terminal 22 such that the TDD detect and bridge control 32 is prompted to create the bridge through the line 43. The particular string or sequence of characters is pre-selected and known to the TDD user and the operator to prompt the creation of the bridge in a particular direction. For example, this second mode may be prompted by the entering of the command "/ bridge out" at the beginning of a line of character text. The "/ bridge out" command is meant to be exemplary; other character strings or sequences could be created to prompt the creation of the bridge. Such a command should be one that is not likely in normal conversation. The TDD detect and bridge control 32 detects the string of characters and enables the bridge 10 to operate in the direction of telephone line 12 to the telephone line 14 through the bridge polarity reversal switch 42. It is also possible that Touch Tone dialing signals of the TDD user phone arranged in a particular sequence may be used as a command to prompt the creation of the bridge. When the directional command specifying a voice bridge from the telephone line 12 to the telephone line 14 is received by the TDD detect and bridge control 32, the bridge 10 is immediately disabled when TDD signals are detected on the telephone line 12 (originating from either the TDD user or operator) so that the TDD signals are not sent through to either the telephone 2S or the telephone line 14, which would otherwise be a significant distraction to either the operator or the non-TDD user. The voice bridge 10 is enabled upon termination of TDD signals to allow the TDD user to speak to the non-TDD user. When the bridge from the telephone line 12 to the telephone line 14 is initially established, the system is preferably designed to automatically send a character set message back to the TDD user acknowledging that the bridge is established.
A third mode of operation is identical to the second mode except that a privacy mode may be invoked that prevents the operator from hearing the audio sounds originating on the telephone line 12. After the request and acknowledgement of a bridge from the telephone 12 to the telephone line 14, the TDD user may further invoke privacy by a second command comprised of either a TDD character sequence or a sequence of Touch Tone dialing signals of the TDD user phone. The particular string or sequence of characters is pre-selected and known to the TDD user and the operator to prompt the privacy option. For example, the TDD user would type in "/ privacy". The "/ privacy" command is meant to be exemplary; other character or touch tone sequences could be created to prompt the creation of the bridge. Such a command should be one that is not likely in normal conversation. When the voice bridge 10 is then enabled by the absence of TDD signals as soon as the TDD user speaks, the level detect circuit 44 cuts off the telephone 28 when the audio is detected on the line 12. The telephone 28 is cut off by the opening of the switch 48 in the manner described above. When there are no audio sounds or if TDD signals are carried on the line 12, the switch 48 closes so that the operator may converse with the non-TDD user on the telephone line 14. When the privacy mode is initially established, the system is preferably designed to automatically send a character set message back to the TDD user acknowledging that the privacy is established.
If the TDD user is speech impaired but capable of hearing, a fourth mode may be activated in which privacy is not invoked and where the voice bridge 10 carries the audio sounds from the telephone line 14 to the telephone line 12. The bridge 10 from the line 14 to the line 12 may be requested by a string of characters typed in on the TDD user terminal (not shown) or on the operator terminal such that the TDD detect and bridge control 32 is prompted to create the bridge through the line 43. For example, this fourth mode may be prompted by the entering of the command "/ bridge in" at the beginning of a line of character text. Such a command is not likely in normal conversation and the TDD detect and bridge control 32 detects the string of characters and enables the bridge 10 to operate in the direction of the telephone line 14 to the telephone line 12 through the bridge polarity reversal switch 42. The formation of the bridge may be alternately prompted by the Touch Tone dialing signals of the TDD user phone. When the directional command specifying a voice bridge from the telephone line 14 to the telephone line 12 is received by the TDD detect and bridge control 32, the bridge is immediately disabled when TDD signals are detected on the telephone line 12 (originating from either the TDD user or the operator) so that the TDD signals are not sent through to either the telephone 28 or the telephone line 14, which would again be a significant distraction to either the operator or the non-TDD user. The voice bridge 10 is enabled upon termination of TDD signals to allow the non-TDD user to speak to the TDD user. When the bridge from the line 14 to the line 12 is initially established, the system is preferably designed to automatically send a character set message to the TDD user acknowledging that the bridge is established.
A fifth mode of operation combines the voice bridge of the fourth mode and the privacy feature of the third mode. In this case, the operator is precluded from hearing the audio sounds of the non-TDD user. The request for privacy may be entered by the operator on behalf of the non-TDD user, or it may be entered by the TDD user. When the voice bridge 10 is then enabled by the absence of TDD signals as soon as the non-TDD user speaks, the level detect circuit 44 cuts off the telephone 30 when audio is detected on the line 14. The telephone 30 is cut off by the opening of the switch 48, in the manner discussed above.
Unlike a traditional conference bridge which allows all the sounds in both directions to be heard by the operator and the second party, then, the voice bridge 10 of the present invention prevents the TDD data sounds from being passed to the operator and the second party, and upon a desired command, prevents the operator from hearing the voice part of the conversation in one direction. The voice bridge 10 detects the TDD signals on the telephone line 12 and disables the voice bridge 10 automatically when such TDD signals are detected. Conversely, the bridge 10 is enabled when the transmission of TDD signals is terminated. The voice bridge 10 may be controlled by either the TDD user or by the operator.
It is understood that the invention is not confined to the particular construction and arrangement of parts herein illustrated and described, but embraces such modified forms thereof as come within the scope of the following claims.
Engelke, Robert M., Colwell, Kevin
| Patent | Priority | Assignee | Title |
| 10015311, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 10051207, | Nov 12 2015 | SORENSON IP HOLDINGS, LLC | Captioning communication systems |
| 10063530, | Jun 16 2016 | SORENSON IP HOLDINGS, LLC | Voice-over-internet protocol credentials |
| 10063691, | Jun 30 2016 | SORENSON IP HOLDINGS, LLC | Detecting dial tone on a telephone line |
| 10186170, | Nov 24 2009 | SORENSON IP HOLDINGS, LLC | Text caption error correction |
| 10278131, | Sep 17 2013 | ParkerVision, Inc. | Method, apparatus and system for rendering an information bearing function of time |
| 10356239, | Jul 27 2016 | SORENSON IP HOLDINGS, LLC | Transcribing audio communication sessions |
| 10389876, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 10469660, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 10491746, | Feb 18 2004 | Ultratec, Inc. | Captioned telephone service |
| 10523808, | Dec 09 2013 | SORENSON IP HOLDINGS, LLC | Echo cancellation for a communication device |
| 10542136, | Jul 27 2016 | SORENSON IP HOLDINGS, LLC | Transcribing audio communication sessions |
| 10542141, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 10574804, | Sep 16 2015 | SORENSON IP HOLDINGS, LLC | Automatic volume control of a voice signal provided to a captioning communication service |
| 10587751, | Feb 18 2004 | Ultratec, Inc. | Captioned telephone service |
| 10623544, | Sep 09 2016 | SORENSON IP HOLDINGS, LLC | Electronic device including a directional microphone |
| 10742805, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 10748523, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 10834252, | Jul 27 2016 | SORENSON IP HOLDINGS, LLC | Transcribing audio communication sessions |
| 10878721, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 10917519, | Feb 28 2014 | Ultratec, Inc. | Semiautomated relay method and apparatus |
| 10972604, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 10972683, | Nov 12 2015 | SORENSON IP HOLDINGS, LLC | Captioning communication systems |
| 11005991, | Feb 18 2004 | Ultratec, Inc. | Captioned telephone service |
| 11190637, | Feb 18 2004 | Ultratec, Inc. | Captioned telephone service |
| 11258900, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 11321047, | Jun 11 2020 | SORENSON IP HOLDINGS, LLC | Volume adjustments |
| 11368581, | Feb 28 2014 | Ultratec, Inc. | Semiautomated relay method and apparatus |
| 11509838, | Nov 12 2015 | SORENSON IP HOLDINGS, LLC | Captioning communication systems |
| 11539900, | Feb 21 2020 | ULTRATEC, INC | Caption modification and augmentation systems and methods for use by hearing assisted user |
| 11562731, | Aug 19 2020 | SORENSON IP HOLDINGS, LLC | Word replacement in transcriptions |
| 11627221, | Feb 28 2014 | Ultratec, Inc. | Semiautomated relay method and apparatus |
| 11664029, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 11741963, | Feb 28 2014 | ULTRATEC, INC | Semiautomated relay method and apparatus |
| 5289521, | Mar 09 1992 | Audio/telecommunications system to assist in speech and cognitive skills development for the verbally handicapped | |
| 5325417, | May 20 1992 | Ultratec, Inc. | Telecommunication device for the deaf with automatic self-identification |
| 5351288, | Oct 11 1988 | ULTRATEC, INC | Voice bridge for a relay center |
| 5379441, | Jun 14 1989 | Matsushita Electric Industrial Co., Ltd. | Homebus system for permitting homebus equipment and ISDN basic interface equipment to use same twisted pair line homebus |
| 5432837, | May 20 1992 | ULTRATEC, INC | Telecommunication device for the deaf with automatic transmission capability |
| 5457731, | Oct 04 1993 | Emergency telecommunications device for the disabled | |
| 5485370, | May 05 1988 | CITICORP DEVELOPMENT CENTER, INC | Home services delivery system with intelligent terminal emulator |
| 5521960, | Oct 03 1994 | Interactive telephonic device for `VCO` relay communication | |
| 5572572, | May 05 1988 | CITICORP DEVELOPMENT CENTER, INC | Computer and telephone apparatus with user friendly interface and enhanced integrity features |
| 5574776, | Dec 13 1993 | THE CHASE MANHATTAN BANK, AS COLLATERAL AGENT | Call redirection feature for relay services |
| 5581593, | Jun 10 1994 | Google Technology Holdings LLC | Combination telephone and alphanumeric entry device |
| 5602846, | Apr 08 1994 | PIRIN POCKET DATA LLC | Simultaneous voice and data call establishment using a simultaneous voice and data modem pool and private branch exchange facilities |
| 5604786, | Jun 10 1994 | ULTRATEC, INC | Telephone with unified features for hearing and deaf users |
| 5627530, | Oct 07 1992 | Positron Industries, Inc. | Device operable as a TDD and a standard computer keyboard |
| 5640444, | Jun 01 1990 | MLR, LLC A LIMITED LIABILITY COMPANY OF VIRGINIA ; SITI-SITES COM, INC | Methods and apparatus for controlling data transmission using radio devices |
| 5687222, | Jul 05 1994 | NXI COMMUNICATIONS, INC ; NEXTALK, INC | ITU/TDD modem |
| 5724405, | Oct 11 1988 | ULTRATEC, INC | Text enhanced telephony |
| 5796832, | Nov 13 1995 | CITICORP CREDIT SERVICES, INC USA | Wireless transaction and information system |
| 5809425, | Jan 03 1995 | Ultratec, Inc. | Gateway for low cost alphanumeric paging entry system |
| 5905476, | Jul 05 1994 | NXI COMMUNICATIONS, INC ; NEXTALK, INC | ITU/TDD modem |
| 5974116, | Jul 02 1998 | ULTRATEC, INC | Personal interpreter |
| 5978654, | Jan 03 1995 | Ultratec, Inc. | Alphanumeric paging entry system |
| 5982861, | Aug 28 1996 | KERI SYSTEMS, INC | Electronic directory and entry control system |
| 6075842, | Oct 11 1988 | Ultratec, Inc. | Text enhanced telephony |
| 6181736, | Mar 25 1997 | MCLAUGHLIN, THOMAS J | Network communication system |
| 6233314, | Sep 08 1997 | Ultratec, Inc. | Relay for personal interpreter |
| 6442532, | Nov 13 1995 | CITICORP CREDIT SERVICES, INC USA | Wireless transaction and information system |
| 6510206, | Sep 19 2000 | ULTRATEC, INC | Relay for personal interpreter |
| 6603835, | Sep 08 1997 | ULTRATEC, INC | System for text assisted telephony |
| 6934376, | Mar 25 1997 | MCLAUGHLIN, THOMAS J | Network communication system |
| 7295663, | Aug 22 2005 | MCLAUGHLIN, THOMAS J | Network communication system |
| 7397772, | Jan 21 2002 | Samsung Electronics Co., Ltd. | Method and apparatus for acoustic echo cancellation in a communication system providing TTY/TDD service |
| 7555104, | Sep 08 1997 | Ultratec, Inc. | Relay for personal interpreter |
| 7660398, | Feb 18 2004 | ULTRATEC, INC | Captioned telephone service |
| 7738842, | Aug 23 2005 | Samsung Electronics Co., Ltd. | Apparatus for protecting receiver circuit in time division duplexing wireless communication system |
| 7750733, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for extending RF transmission bandwidth |
| 7835709, | Oct 22 2004 | ParkerVision, Inc | RF power transmission, modulation, and amplification using multiple input single output (MISO) amplifiers to process phase angle and magnitude information |
| 7844235, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification, including harmonic control embodiments |
| 7881441, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 7885682, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
| 7911272, | Jun 19 2007 | ParkerVision, Inc | Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments |
| 7929989, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
| 7932776, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification embodiments |
| 7937106, | Apr 24 2006 | ParkerVision, Inc | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
| 7945224, | Oct 22 2004 | ParkerVision, Inc | Systems and methods of RF power transmission, modulation, and amplification, including waveform distortion compensation embodiments |
| 7949365, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
| 8013675, | Jun 19 2007 | ParkerVision, Inc | Combiner-less multiple input single output (MISO) amplification with blended control |
| 8026764, | Apr 24 2006 | ParkerVision, Inc. | Generation and amplification of substantially constant envelope signals, including switching an output among a plurality of nodes |
| 8031804, | Apr 24 2006 | ParkerVision, Inc | Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion |
| 8036306, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation and amplification, including embodiments for compensating for waveform distortion |
| 8050353, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for compensating for waveform distortion |
| 8059749, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for compensating for waveform distortion |
| 8213578, | Sep 08 1997 | ULTRATEC, INC | System for text assisted telephony |
| 8233858, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification embodiments, including control circuitry for controlling power amplifier output stages |
| 8238847, | Oct 22 2004 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments |
| 8280321, | Oct 22 2004 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including Cartesian-Polar-Cartesian-Polar (CPCP) embodiments |
| 8315336, | May 18 2007 | ParkerVision, Inc | Systems and methods of RF power transmission, modulation, and amplification, including a switching stage embodiment |
| 8334722, | Jun 28 2007 | ParkerVision, Inc | Systems and methods of RF power transmission, modulation and amplification |
| 8351870, | Oct 22 2004 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments |
| 8406711, | Oct 22 2004 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including a Cartesian-Polar-Cartesian-Polar (CPCP) embodiment |
| 8410849, | Jun 19 2007 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments |
| 8416925, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 8428527, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments |
| 8433264, | Oct 22 2004 | ParkerVision, Inc. | Multiple input single output (MISO) amplifier having multiple transistors whose output voltages substantially equal the amplifier output voltage |
| 8447248, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification, including power control of multiple input single output (MISO) amplifiers |
| 8461924, | Jun 19 2007 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for controlling a transimpedance node |
| 8502600, | Jun 19 2007 | ParkerVision, Inc. | Combiner-less multiple input single output (MISO) amplification with blended control |
| 8515024, | Jan 13 2010 | Ultratec, Inc. | Captioned telephone service |
| 8548093, | May 18 2007 | ParkerVision, Inc. | Power amplification based on frequency control signal |
| 8577313, | Oct 22 2004 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including output stage protection circuitry |
| 8626093, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification embodiments |
| 8639196, | Oct 22 2004 | ParkerVision, Inc. | Control modules |
| 8755454, | Jun 02 2011 | ParkerVision, Inc | Antenna control |
| 8766717, | Jun 19 2007 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including varying weights of control signals |
| 8781418, | Oct 22 2004 | ParkerVision, Inc. | Power amplification based on phase angle controlled reference signal and amplitude control signal |
| 8884694, | Jun 28 2007 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification |
| 8908838, | Aug 23 2001 | ULTRATEC, INC | System for text assisted telephony |
| 8913691, | May 18 2007 | ParkerVision, Inc. | Controlling output power of multiple-input single-output (MISO) device |
| 8913974, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments |
| 8917821, | Jun 29 2005 | Ultratec, Inc. | Device independent text captioned telephone service |
| 8917822, | Aug 23 2001 | ULTRATEC, INC | System for text assisted telephony |
| 9094085, | Jun 19 2007 | ParkerVision, Inc. | Control of MISO node |
| 9106316, | May 27 2008 | ParkerVision, Inc | Systems and methods of RF power transmission, modulation, and amplification |
| 9106500, | Apr 24 2006 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for error correction |
| 9131045, | Aug 23 2001 | ULTRATEC, INC | System for text assisted telephony |
| 9143088, | Oct 22 2004 | ParkerVision, Inc. | Control modules |
| 9166528, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification embodiments |
| 9197163, | Oct 22 2004 | ParkVision, Inc. | Systems, and methods of RF power transmission, modulation, and amplification, including embodiments for output stage protection |
| 9197164, | Oct 22 2004 | ParkerVision, Inc. | RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments |
| 9419692, | Jun 02 2011 | ParkerVision, Inc. | Antenna control |
| 9497315, | Jul 27 2016 | SORENSON IP HOLDINGS, LLC | Transcribing audio communication sessions |
| 9503568, | Jun 30 2016 | SORENSON IP HOLDINGS, LLC | Detecting dial tone on a telephone line |
| 9525830, | Nov 12 2015 | SORENSON IP HOLDINGS, LLC | Captioning communication systems |
| 9608677, | Apr 08 2011 | PARKER VISION, INC | Systems and methods of RF power transmission, modulation, and amplification |
| 9614484, | Jun 19 2007 | ParkerVision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including control functions to transition an output of a MISO device |
| 9614973, | Jun 16 2016 | SORENSON IP HOLDINGS, LLC | Voice over internet protocol credentials |
| 9628596, | Sep 09 2016 | SORENSON IP HOLDINGS, LLC | Electronic device including a directional microphone |
| 9674341, | Jul 27 2016 | SORENSON IP HOLDINGS, LLC | Transcribing audio communication sessions |
| 9674351, | Oct 06 2016 | SORENSON IP HOLDINGS, LLC | Remote voice recognition |
| 9679578, | Aug 31 2016 | SORENSON IP HOLDINGS, LLC | Signal clipping compensation |
| 9705540, | Jun 19 2007 | Parker Vision, Inc. | Control of MISO node |
| 9768733, | Oct 22 2004 | Parker Vision, Inc. | Multiple input single output device with vector signal and bias signal inputs |
| 9961196, | Aug 23 2001 | Ultratec, Inc. | System for text assisted telephony |
| 9967380, | Aug 23 2001 | Ultratec, Inc. | System for text assisted telephony |
| 9998686, | Nov 12 2015 | SORENSON IP HOLDINGS, LLC | Transcribing video communication sessions |
| RE37141, | Sep 10 1984 | MLR, LLC A LIMITED LIABILITY COMPANY OF VIRGINIA ; SITI-SITES COM, INC | Cellular telephone data communication system and method |
| RE38645, | Jan 19 1989 | MLR, LLC A LIMITED LIABILITY COMPANY OF VIRGINIA ; SITI-SITES COM, INC | Portable hybrid communication system and methods |
| RE39427, | Oct 11 1985 | MLR, LLC A LIMITED LIABILITY COMPANY OF VIRGINIA ; SITI-SITES COM, INC | Cellular telephone data communication system and method |
| Patent | Priority | Assignee | Title |
| 3585303, | |||
| 3896267, | |||
| 4012599, | Jul 29 1975 | Telephone communications system for the deaf | |
| 4191854, | Jan 06 1978 | Telephone-coupled visual alphanumeric communication device for deaf persons | |
| 4268721, | May 02 1977 | SRI International | Portable telephone communication device for the hearing impaired |
| 4426555, | Jan 18 1982 | RCA LICENSING CORPORATION, A DE CORP | Telephone communications device for hearing-impaired person |
| 4503288, | Aug 31 1981 | INFORMATION MACHINES CORPORATION, A CA CORP | Intelligent telephone |
| 4524244, | Aug 05 1983 | CYGNET TECHNOLOGIES, INC , | Digital and voice telecommunication apparatus |
| 4650927, | Nov 29 1984 | International Business Machines Corporation | Processor-assisted communication system using tone-generating telephones |
| GB2183880, | |||
| JP55649, | |||
| JP134568, |
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| Apr 14 1994 | COLWELL, KEVIN | ULTRATEC, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 006950 | /0470 |
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